loungesong,
That would be a costly matter to get done what you are asking, for a couple of reasons.
1. You would have to have your ARID move to that vendor which costs money for Mitel to do that for you.
2. You would have to pay Mitel to reset your password.
Your best bet, as you have already figured out, is to do a reset [default] of the system and put in your own password, and then just program the system from the base.
Of course you would have to know how your system was configured in the first place or you would need to start from scratch.
If you reload the database you have back in the password will be restored as well.
Thanks,
TE